Going through airport security is tough these days, but especially if you’re carrying hollow-point bullets. That’s what Master P found out on Tuesday, when police at Newark Airport arrested the gangsta rap mogul for allegedly trying to pass the illegal ammo through security, the New York Post reports.

Police told the Post that Master P (real name: Percy Miller) was on his way from New Jersey to Los Angeles when he tried to check a case that he told security personnel contained an unloaded handgun for which he was properly licensed. But the agents said they found the six armor-piercing rounds in a separate magazine. He was arrested, taken to Union County Jail in nearby Elizabeth, issued a summons, and released. Possession of the so-called ”cop killer” bullets is a third-class felony in New Jersey, though conviction on a first offense would result in a likely sentence of probation.